Theoretical analysis of human muscle membrane behaviour in hypokalemic periodic paralysis


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Alberink, Martin J. and Wallinga, Willemien and Wolters, Henk and Ypey, Dirk L. and Links, Thera P. and Boom, Herman B.K. (1995) Theoretical analysis of human muscle membrane behaviour in hypokalemic periodic paralysis. In: IEEE 17th Annual Conference Engineering in Medicine and Biology Society, 20-23 Sept. 1995, Montreal, Canada (pp. pp. 1493-1494).

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Abstract:Computer simulations were performed to investigate the behavior of human muscle membrane with membrane defects supposed to be present in the muscular disease Hypokalemic Periodic Paralysis (HOPP). The model used for simulation was a Hodgkin-Huxley model. The T-tubular system was also incorporated. It was studied whether the membrane defects caused the following recorded HOPP phenomena: a slight depolarization of a HOPP muscle cell when serum potassium is normal and a strong depolarization to -50 mV when serum potassium is low. In the authors' model a constant small sodium leak conductance slightly depolarized the cell, whereas a small fraction of noninactivating sodium channels caused a strong depolarization. In the case of a dependency of this fraction on serum potassium according to a Boltzmann relation such a depolarization occurred only when serum potassium was low. In the authors' simulations, the resting membrane potential moved from -90 mV to -30 mV after a single action potential when 8%, or more of the sodium channels did not inactivate. The authors' results were qualitatively similar when the T-tubular system was decoupled
Item Type:Conference or Workshop Item
Copyright:© 1995 IEEE
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Link to this item:http://purl.utwente.nl/publications/17356
Official URL:http://dx.doi.org/10.1109/IEMBS.1995.579793
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Metis ID: 114251